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| No.9122534
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Information Name: | To supply 60CrMnA spring steel material steel plate |
Published: | 2012-11-12 |
Validity: | 1000000 |
Specifications: | Complete |
Quantity: | 1000000.00 |
Price Description: | |
Detailed Product Description: | 1. Performance requirements of (1) a high elastic limit σe and yield ratio σs of / strength σb in order to guarantee the excellent elastomeric properties, i.e. to absorb a large amount of elastic energy is not plastically deformed; ② a high fatigue limit, the spring fatigue is the most important failure modes. fatigue performance except with the composition of the steel structure, mainly by the metallurgical quality of steel (such as non-metallic inclusions) and spring surface quality (decarburization); ③ sufficient ductility and toughness to prevent shock fracture; ④ Other properties, such as good heat treatment and plastic working property, under special conditions, the work of the heat resistance or corrosion resistance requirements. 2. The carbon content of alloying elements and compositional characteristics of steel: 1., High-carbon to carbon spring steel wc = 0.6% to 0.9%, the alloy spring steel wc = 0.45% ~ 0.70%, quenched and temperature the tempering after tempering troostite organization can better guarantee the spring of performance requirements. 2 general purpose alloy spring steel alloying elements are generally low-alloy steel. Main plus elements Si, Mn, Cr, etc., and its main role is to improve the hardenability, the solid solution strengthening the matrix and to improve the tempering stability; auxiliary plus elements Mo, W, V and other strong carbide forming elements, the main role to prevent decarburization defects caused by the Si, Mn caused overheating defects and improve the tempering stability and heat resistance, etc.. 1 carbon spring steel (non-alloy spring steel) its cheap but poor hardenability, suitable for smaller cross-sectional dimension of the non-important spring, which is most commonly used to 65,65 Mn. Alloy spring steel according to the main types of alloying elements can be divided into two categories: Si-Mn Department of spring steel, spring steel and Cr system. Former hardenability compared with high-carbon steel, the price is not very expensive, it is the most widely used, mainly used for the cross-sectional dimension of not more than 25mm all kinds the spring, 60Si2Mn is a typical representative; latter hardenability better overall mechanical high performance spring surface is not easy to decarburization, but the price is relatively high, generally used for larger cross-sectional dimension spring, 50CrVA is a typical representative. 4. Heat treatment characteristics of spring steel heat treatment depends on the spring Forming method thermoformed spring and cold forming spring, generally can be divided into two categories: 1. Thermal forming spring section size> 10mm large and complex shape spring using thermal forming (such as hot-rolled, hot rolled), such as automobiles, tractors, trains, leaf springs and coil springs. Its the Condensed processing route for: and under flat steel or round steel material → heating bending or winding → quenching medium temperature tempering → surface shot peening use status is tempered troostite. Peening can enhance the surface and improve the quality of the spring surface, significantly improved fatigue performance. Cold forming the spring-sectional dimensions the <10mm various small spring can be used cold forming (such as cold coil, cold rolled), the instrument coil spring, the clockwork and a spring sheet or the like. Type of spring before forming first cold-drawn (cold) after quenching and tempering in the temperature or lead bath austempering cold drawn (rolled) strengthened; then cold forming, this process will further strengthen the metal, but also generate a large internal stress and brittleness, it should be carried out in the subsequent low temperature (generally 200 to 400 ° C) to stress annealing. |
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Copyright © GuangDong ICP No. 10089450, Guangdong governor An Jiawang Metal Materials Co., Ltd. All rights reserved.
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You are the 20078 visitor
Copyright © GuangDong ICP No. 10089450, Guangdong governor An Jiawang Metal Materials Co., Ltd. All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility